'use strict';

// Do this as the first thing so that any code reading it knows the right env.
process.env.BABEL_ENV = 'development';
process.env.NODE_ENV = 'development';

// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on('unhandledRejection', err => {
	throw err;
});

// Ensure environment variables are read.
require('../config/env');

const fs = require('fs');
const chalk = require('chalk');
const webpack = require('webpack');
const WebpackDevServer = require('webpack-dev-server');
const clearConsole = require('react-dev-utils/clearConsole');
const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
const {
	choosePort,
	createCompiler,
	prepareProxy,
	prepareUrls,
} = require('react-dev-utils/WebpackDevServerUtils');
const openBrowser = require('react-dev-utils/openBrowser');
const paths = require('../config/paths');
const config = require('../config/webpack.config.dev');
const createDevServerConfig = require('../config/webpackDevServer.config');
const startRekitStudio = require('./startRekitStudio');

const useYarn = fs.existsSync(paths.yarnLockFile);
process.stdout.isTTY = false;
const isInteractive = process.stdout.isTTY;

// Warn and crash if required files are missing
if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
	process.exit(1);
}

// Tools like Cloud9 rely on this.
const DEFAULT_PORT =
	parseInt(process.env.PORT, 10) || require(paths.appPackageJson).rekit.devPort || 3000;
const HOST = process.env.HOST || '0.0.0.0';

if (process.env.HOST) {
	console.log(
		chalk.cyan(
			`Attempting to bind to HOST environment variable: ${chalk.yellow(
				chalk.bold(process.env.HOST),
			)}`,
		),
	);
	console.log(
		`If this was unintentional, check that you haven't mistakenly set it in your shell.`,
	);
	console.log(`Learn more here: ${chalk.yellow('http://bit.ly/2mwWSwH')}`);
	console.log();
}

// Start Rekit Studio
const studioPort = require(paths.appPackageJson).rekit.studioPort;
const devPort = require(paths.appPackageJson).rekit.devPort;
startRekitStudio(studioPort).then(() =>
	// We attempt to use the default port but if it is busy, we offer the user to
	// run on a different port. `choosePort()` Promise resolves to the next free port.
	choosePort(HOST, DEFAULT_PORT)
		.then(port => {
			if (port == null) {
				// We have not found a port.
				return;
			}
			const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
			const appName = require(paths.appPackageJson).name;
			const urls = prepareUrls(protocol, HOST, port);
			// Create a webpack compiler that is configured with custom messages.
			const compiler = createCompiler(webpack, config, appName, urls, useYarn);
			compiler.plugin('done', stats => {
				console.log(
					chalk.bold(`To use Rekit Studio, access: http://localhost:${studioPort}`),
				);
				console.log(chalk.bold(`DGOV project, access: http://localhost:${devPort}`));
				console.log();
			});
			// Load proxy config
			const proxySetting = require(paths.appPackageJson).proxy;
			const proxyConfig = prepareProxy(proxySetting, paths.appPublic);
			// Serve webpack assets generated by the compiler over a web sever.
			const serverConfig = createDevServerConfig(proxyConfig, urls.lanUrlForConfig);
			const devServer = new WebpackDevServer(compiler, serverConfig);
			// Launch WebpackDevServer.
			devServer.listen(port, HOST, err => {
				if (err) {
					return console.log(err);
				}
				if (isInteractive) {
					clearConsole();
				}
				console.log(chalk.cyan('Starting the development server...\n'));
				openBrowser(urls.localUrlForBrowser);
			});

			['SIGINT', 'SIGTERM'].forEach(function(sig) {
				process.on(sig, function() {
					devServer.close();
					process.exit();
				});
			});
		})
		.catch(err => {
			if (err && err.message) {
				console.log(err.message);
			}
			process.exit(1);
		}),
);
